<template>
  <div class="panel-tab__content">
    <el-table :data="elementListenersList" size="small" border>
      <el-table-column label="序号" width="50px" type="index" />
      <el-table-column label="事件类型" min-width="100px" prop="event" />
      <el-table-column label="监听器类型" min-width="100px" show-overflow-tooltip :formatter="row => listenerTypeObject[row.listenerType]" />
      <el-table-column label="操作" width="90px">
        <template #default="scope">
          <el-button link type="" @click="openListenerForm(scope.row, scope.$index)">编辑</el-button>
          <el-divider direction="vertical" />
          <el-button link type="" style="color: #ff4d4f" @click="removeListener(scope.row, scope.$index)">移除</el-button>
        </template>
      </el-table-column>
    </el-table>
    <div class="element-drawer__button">
      <el-button size="small" type="primary" :icon="Plus" @click="openListenerForm(null)">添加监听器</el-button>
    </div>

    <!-- 监听器 编辑/创建 部分 -->
    <el-drawer v-model="listenerFormModelVisible" title="执行监听器" :size="`${width}px`" append-to-body destroy-on-close>
      <el-form size="small" :model="listenerForm" label-width="96px" ref="listenerFormRef" @submit.prevent>
        <el-form-item label="事件类型" prop="event" :rules="{ required: true, trigger: ['blur', 'change'] }">
          <el-select v-model="listenerForm.event">
            <el-option label="start" value="start" />
            <el-option label="end" value="end" />
          </el-select>
        </el-form-item>
        <el-form-item label="监听器类型" prop="listenerType" :rules="{ required: true, trigger: ['blur', 'change'] }">
          <el-select v-model="listenerForm.listenerType">
            <el-option v-for="i in Object.keys(listenerTypeObject)" :key="i" :label="listenerTypeObject[i]" :value="i" />
          </el-select>
        </el-form-item>
        <el-form-item
          v-if="listenerForm.listenerType === 'classListener'"
          label="Java类"
          prop="class"
          key="listener-class"
          :rules="{ required: true, trigger: ['blur', 'change'] }"
        >
          <el-input v-model="listenerForm.class" clearable />
        </el-form-item>
        <el-form-item
          v-if="listenerForm.listenerType === 'expressionListener'"
          label="表达式"
          prop="expression"
          key="listener-expression"
          :rules="{ required: true, trigger: ['blur', 'change'] }"
        >
          <el-input v-model="listenerForm.expression" clearable />
        </el-form-item>
        <el-form-item
          v-if="listenerForm.listenerType === 'delegateExpressionListener'"
          label="代理表达式"
          prop="delegateExpression"
          key="listener-delegate"
          :rules="{ required: true, trigger: ['blur', 'change'] }"
        >
          <el-input v-model="listenerForm.delegateExpression" clearable />
        </el-form-item>
        <template v-if="listenerForm.listenerType === 'scriptListener'">
          <el-form-item
            label="脚本格式"
            prop="scriptFormat"
            key="listener-script-format"
            :rules="{ required: true, trigger: ['blur', 'change'], message: '请填写脚本格式' }"
          >
            <el-input v-model="listenerForm.scriptFormat" clearable />
          </el-form-item>
          <el-form-item
            label="脚本类型"
            prop="scriptType"
            key="listener-script-type"
            :rules="{ required: true, trigger: ['blur', 'change'], message: '请选择脚本类型' }"
          >
            <el-select v-model="listenerForm.scriptType">
              <el-option label="内联脚本" value="inlineScript" />
              <el-option label="外部脚本" value="externalScript" />
            </el-select>
          </el-form-item>
          <el-form-item
            v-if="listenerForm.scriptType === 'inlineScript'"
            label="脚本内容"
            prop="value"
            key="listener-script"
            :rules="{ required: true, trigger: ['blur', 'change'], message: '请填写脚本内容' }"
          >
            <el-input v-model="listenerForm.value" clearable />
          </el-form-item>
          <el-form-item
            v-if="listenerForm.scriptType === 'externalScript'"
            label="资源地址"
            prop="resource"
            key="listener-resource"
            :rules="{ required: true, trigger: ['blur', 'change'], message: '请填写资源地址' }"
          >
            <el-input v-model="listenerForm.resource" clearable />
          </el-form-item>
        </template>
      </el-form>
      <el-divider />
      <p class="listener-filed__title">
        <span><el-icon><Menu /></el-icon>注入字段：</span>
        <el-button size="small" type="primary" @click="openListenerFieldForm(null)">添加字段</el-button>
      </p>
      <el-table :data="fieldsListOfListener" size="small" max-height="240" border fit style="flex: none">
        <el-table-column label="序号" width="50px" type="index" />
        <el-table-column label="字段名称" min-width="100px" prop="name" />
        <el-table-column label="字段类型" min-width="80px" show-overflow-tooltip :formatter="row => fieldTypeObject[row.fieldType]" />
        <el-table-column label="字段值/表达式" min-width="100px" show-overflow-tooltip :formatter="row => row.string || row.expression" />
        <el-table-column label="操作" width="100px">
          <template #default="scope">
            <el-button link type="" @click="openListenerFieldForm(scope.row, scope.$index)">编辑</el-button>
            <el-divider direction="vertical" />
            <el-button link type="" style="color: #ff4d4f" @click="removeListenerField(scope.row, scope.$index)">移除</el-button>
          </template>
        </el-table-column>
      </el-table>

      <div class="element-drawer__button">
        <el-button size="small" @click="listenerFormModelVisible = false">取 消</el-button>
        <el-button size="small" type="primary" @click="saveListenerConfig">保 存</el-button>
      </div>
    </el-drawer>

    <!-- 注入西段 编辑/创建 部分 -->
    <el-dialog title="字段配置" v-model="listenerFieldFormModelVisible" width="600px" append-to-body destroy-on-close>
      <el-form :model="listenerFieldForm" size="small" label-width="96px" ref="listenerFieldFormRef" style="height: 136px" @submit.prevent>
        <el-form-item label="字段名称：" prop="name" :rules="{ required: true, trigger: ['blur', 'change'] }">
          <el-input v-model="listenerFieldForm.name" clearable />
        </el-form-item>
        <el-form-item label="字段类型：" prop="fieldType" :rules="{ required: true, trigger: ['blur', 'change'] }">
          <el-select v-model="listenerFieldForm.fieldType">
            <el-option v-for="i in Object.keys(fieldTypeObject)" :key="i" :label="fieldTypeObject[i]" :value="i" />
          </el-select>
        </el-form-item>
        <el-form-item
          v-if="listenerFieldForm.fieldType === 'string'"
          label="字段值："
          prop="string"
          key="field-string"
          :rules="{ required: true, trigger: ['blur', 'change'] }"
        >
          <el-input v-model="listenerFieldForm.string" clearable />
        </el-form-item>
        <el-form-item
          v-if="listenerFieldForm.fieldType === 'expression'"
          label="表达式："
          prop="expression"
          key="field-expression"
          :rules="{ required: true, trigger: ['blur', 'change'] }"
        >
          <el-input v-model="listenerFieldForm.expression" clearable />
        </el-form-item>
      </el-form>
      <template #footer>
        <el-button size="small" @click="listenerFieldFormModelVisible = false">取 消</el-button>
        <el-button size="small" type="primary" @click="saveListenerFiled">确 定</el-button>
      </template>
    </el-dialog>
  </div>
</template>
<script lang="ts" setup>
  import { ElMessageBox } from 'element-plus'
  import { createListenerObject, updateElementExtensions } from "../../utils";
  import { initListenerType, initListenerForm, listenerType, fieldType } from "./utilSelf";
  import { Plus } from '@element-plus/icons-vue'

  defineOptions({ name: 'ElementListeners' })

  const props = defineProps({
    id: String,
    type: String
  })
  const prefix = inject('prefix')
  const width = inject('width')

  const elementListenersList = ref<any[]>([]) // 监听器列表
  const listenerForm = ref<any>({}) // 监听器详情表单
  const listenerFormModelVisible = ref(false) // 监听器 编辑 侧边栏显示状态
  const fieldsListOfListener = ref<any[]>([])
  const listenerFieldForm = ref<any>({}) // 监听器 注入字段 详情表单
  const listenerFieldFormModelVisible = ref(false) // 监听器 注入字段表单弹窗 显示状态
  const editingListenerIndex = ref(-1) // 监听器所在下标，-1 为新增
  const editingListenerFieldIndex = ref(-1) // 字段所在下标，-1 为新增
  const listenerTypeObject = ref(listenerType)
  const fieldTypeObject = ref(fieldType)
  const bpmnElement = ref()
  const otherExtensionList = ref()
  const bpmnElementListeners = ref()
  const listenerFormRef = ref()
  const listenerFieldFormRef = ref()
  const bpmnInstances = () => (window as any)?.bpmnInstances

  const resetListenersList = () => {
    bpmnElement.value = bpmnInstances().bpmnElement
    otherExtensionList.value = []
    bpmnElementListeners.value =
      bpmnElement.value.businessObject?.extensionElements?.values?.filter(
        (ex) => ex.$type === `${prefix}:ExecutionListener`
      ) ?? []
    elementListenersList.value = bpmnElementListeners.value.map((listener) =>
      initListenerType(listener)
    )
  }
  // 打开 监听器详情 侧边栏
  const openListenerForm = (listener, index?) => {
    if (listener) {
      listenerForm.value = initListenerForm(listener)
      editingListenerIndex.value = index
    } else {
      listenerForm.value = {}
      editingListenerIndex.value = -1 // 标记为新增
    }
    if (listener && listener.fields) {
      fieldsListOfListener.value = listener.fields.map((field) => ({
        ...field,
        fieldType: field.string ? 'string' : 'expression'
      }))
    } else {
      fieldsListOfListener.value = []
      listenerForm.value['fields'] = []
    }
    // 打开侧边栏并清楚验证状态
    listenerFormModelVisible.value = true
    nextTick(() => {
      if (listenerFormRef.value) {
        listenerFormRef.value.clearValidate()
      }
    })
  }
  // 打开监听器字段编辑弹窗
  const openListenerFieldForm = (field, index?) => {
    listenerFieldForm.value = field ? JSON.parse(JSON.stringify(field)) : {}
    editingListenerFieldIndex.value = field ? index : -1
    listenerFieldFormModelVisible.value = true
    nextTick(() => {
      if (listenerFieldFormRef.value) {
        listenerFieldFormRef.value.clearValidate()
      }
    })
  }
  // 保存监听器注入字段
  const saveListenerFiled = async () => {
    let validateStatus = await listenerFieldFormRef.value.validate()
    if (!validateStatus) return // 验证不通过直接返回
    if (editingListenerFieldIndex.value === -1) {
      fieldsListOfListener.value.push(listenerFieldForm.value)
      listenerForm.value.fields.push(listenerFieldForm.value)
    } else {
      fieldsListOfListener.value.splice(editingListenerFieldIndex.value, 1, listenerFieldForm.value)
      listenerForm.value.fields.splice(editingListenerFieldIndex.value, 1, listenerFieldForm.value)
    }
    listenerFieldFormModelVisible.value = false
    nextTick(() => {
      listenerFieldForm.value = {}
    })
  }
  // 移除监听器字段
  const removeListenerField = (index) => {
    ElMessageBox.confirm('确认移除该字段吗？', '提示', {
      confirmButtonText: '确 认',
      cancelButtonText: '取 消'
    })
      .then(() => {
        fieldsListOfListener.value.splice(index, 1)
        listenerForm.value.fields.splice(index, 1)
      })
      .catch(() => console.info('操作取消'))
  }
  // 移除监听器
  const removeListener = (index) => {
    ElMessageBox.confirm('确认移除该监听器吗？', '提示', {
      confirmButtonText: '确 认',
      cancelButtonText: '取 消'
    })
      .then(() => {
        bpmnElementListeners.value.splice(index, 1)
        elementListenersList.value.splice(index, 1)
        updateElementExtensions(
          bpmnElement.value,
          otherExtensionList.value.concat(bpmnElementListeners.value)
        )
      })
      .catch(() => console.info('操作取消'))
  }
  // 保存监听器配置
  const saveListenerConfig = async () => {
    let validateStatus = await listenerFormRef.value.validate()
    if (!validateStatus) return // 验证不通过直接返回
    const listenerObject = createListenerObject(listenerForm.value, false, prefix)
    if (editingListenerIndex.value === -1) {
      bpmnElementListeners.value.push(listenerObject)
      elementListenersList.value.push(listenerForm.value)
    } else {
      bpmnElementListeners.value.splice(editingListenerIndex.value, 1, listenerObject)
      elementListenersList.value.splice(editingListenerIndex.value, 1, listenerForm.value)
    }
    // 保存其他配置
    otherExtensionList.value =
      bpmnElement.value.businessObject?.extensionElements?.values?.filter(
        (ex) => ex.$type !== `${prefix}:ExecutionListener`
      ) ?? []
    updateElementExtensions(
      bpmnElement.value,
      otherExtensionList.value.concat(bpmnElementListeners.value)
    )
    // 4. 隐藏侧边栏
    listenerFormModelVisible.value = false
    listenerForm.value = {}
  }

  watch(
    () => props.id,
    (val) => {
      val &&
        val.length &&
        nextTick(() => {
          resetListenersList()
        })
    },
    { immediate: true }
  )

</script>
